Three more police officers have been suspended following the broadcast of a controversial documentary exposing racism among recruits.

Two officers from Greater Manchester Police and one officer from Cheshire were suspended after the programme was broadcast last night.

Four officers, three from Greater Manchester and one from North Wales Police, had already been suspended before the programme, The Secret Policeman, was aired on BBC1.

Greater Manchester Police Assistant Chief Constable Alan Green said the force expected to take further action once it received extra material from the BBC.

He said: "Racism has no place in Greater Manchester Police and we are totally committed to tackling it both inside and outside the force. Our investigation into the issues, which is being independently supervised, will be thorough."

His counterpart in Cheshire, David Green, said the racist conduct shown in the programme was "abhorrent".

He said: "There is great disappointment and anger at all levels within the police service that a small group of officers, including one from Cheshire, have let us all down."

In the programme, Glaswegian journalist Mark Daly, 28, went undercover as a trainee officer with Greater Manchester Police.

During the seven months before he was arrested and exposed in August, Daly secretly filmed a number of recruits at Bruche National Training Centre in Warrington, Cheshire.

Among them was one trainee officer who told of his desire to kill an Asian while also claiming Hitler "had the right idea".

The same recruit is also seen wearing a home-made white mask to mimic those worn by the notorious American racist group the Ku Klux Klan.